OFFSET
1,4
COMMENTS
It appears that the sequence is periodic with period (1,1,1,5,1,1,1,9) of length 8.
LINKS
Index entries for linear recurrences with constant coefficients, signature (0,0,0,0,0,0,0,1).
EXAMPLE
Assume that a(1) - a(7) have been determined as {1,1,1,5,1,1,1}. Then a(8)=1 gives consecutive terms 1,1,1,1, summing to 4; a(8)=2 gives 1+1+2=4; ... etc...; a(8)=8 gives 5+1+1+1+8=16; but a(8)=9 is ok, giving no sum of consecutive terms equalling 4,16,64,... .
MATHEMATICA
LinearRecurrence[{0, 0, 0, 0, 0, 0, 0, 1}, {1, 1, 1, 5, 1, 1, 1, 9}, 105] (* Ray Chandler, Aug 25 2015 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
John W. Layman, Dec 02 2009
STATUS
approved